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Springs (Geometrical characteristics (Outer diameter : De, Interior…
Springs
Geometrical characteristics
Outer diameter : De
Interior diameter : Di
Wire diameter : d
Length : Lo
Pitch : p (constant)
Useful number of coils : nu
Diamètre de fonctionnement du ressort : h (alésage)
Length with adjacent coils : Lc
Test bench
Static test
Dynamic test
Non destructive test
Measurement / Sensors
Force
Displacement
Acceleration
Design for recycling
Tested springs
Compression/tension spring
Small stiffness : 5 to 20 n/mm
Cylindrical springs
De : 6 to 20 mm
Physical characteristics
Materials
Steel
Bronze
Bronze beryllium
Stainless steel
Monel
Static stiffness : ks (N/mm)
Dynamic stiffness : kd (N/mm)
Structural damping
Resonance frequency
Physical laws
Static : F=k.(x-x0)
Dynamic : omega=(k.m)^0.5
System modeling
Vibration
Weight + spring system